Adjustable stop



Patented July 11, `195() UNITED STATES PATENT OFFICE 2,514,600 f L. l fADJUSTABLE STOP y Elmer Felleson, Chicago, Ill.

Application March 21, 1 946, Serial No. 656,113

3 Claims. l

This invention vrelates to a new and improved adjustable stop and hasfor one of its principal objects the provision of means for effectingaccurate adjustment of a stop member for use in conjunction with millingmachines, lathes, or other similar machines.

An important object of this invention is to provide a limit stop memberthat can be accurately adjusted through the use of a calibrated scale.

Another important object of the invention is to provide an axiallyprojectable stop member having its operating mechanism completelyenclosed.

A still further important object of this invention is the provision of asimple eilicient adjustable stop member that is easy to operate and thatwill not be aiected by foreign objects or material coming in contactwith the exterior thereof.

Another and further object is to provide an axially movable stop memberwithvrespect to a xed housing member and having means for limiting themovement thereof through a predetermined range.

Other and further important objects of this invention will becomeapparent from the following speciiication and accompanying drawing, inwhich:

Figure 1 is a top plan view of the adjustable stop of this invention.

Figure 2 is a side elevational view oi the stop as shown in Figure 1.

Figure 3 is `a sectional view taken on the line 3-3 of Figure 1.

Figure 4 is an end View of the adjustable stop. Figure 5 is a sectionalview taken on the line 5--5 of Figure 3.

As shown in the drawing:

The reference numeral I indicates generallyv a housing having arelatively ilat portion I I having holes |2 for attachment to someexternal structure such as a milling machine. The remainder of thehousing I0 includes a portion I3 having a bore I4 extendinglongitudinally thereof and substantially the entire length thereof. Asbest shown in Figure 3, the bore I4 has an opening at the end I of thehousing. The bore includes a relatively large diameter opening portionI6 and v a relatively Small diameter portion I1 projecting inwardly fromthe opening portion I6 to a point I8 very close but not passing throughthe end I9 of the portion I3 of the housing l0. The portion |'I of thebore I4 is internally threaded as shown at 20.

Anv adjustable stop comprising a cylindrical member 2| has a portion 22which is externally threaded for engagement with the internally threadedportion 2l) of the bore |4. The remaining portion 23 of the stop member2| has a smooth surface and projects outwardly from the housing I0.

An actuating member 24 is formed as a sleeve having a portion 25 ofwhich slidably telescopes the enlarged opening portion IS of the boreI4. The remaining portion 26 of the actuating member 24- includes aknurled portion 2l for manual 2` rotation thereof and an annular scale'portion 28 calibrated in increments in thousandths of an inch. Anindexing point 29 on the surface of the housing I3 indicates theposition of the' stop member. n

In order to effect axialmovement of 'the'stop member 2| with respecttothe housing IB, a p'in 30 having a slidable fit within an aperture 3|in the portion 25 of the sleeve actuating member projects radiallyinwardly to a position in engagement with a surface groove 32. inthecylindrical stop member 2 I. The length of the groove 32 determines theamount of travel capable by the stop member 2| with respect to thehousing Ill. As best shown in Figure 5, the surface groove 32 has theupper portion of its sidewalls slightly tapered as shown at 33. Thisslight taper`3,3 permits the pin 3|) to slidably pass through ,thelength of the groove 32 without `fricticnal interference from thethreads 22 which cover the surface of a portion of the stop member 2 I.

As best shown in Figure, an *annulary groove 34 in the portion 25 of thesleeve actuating member |26 permits a set screw 35 in the housing I0 tobe turned upwardly therein and prevents withdrawal of the sleeve member2t from its vposition with respect to the housing I0. AAs shown inFigures l and 2, the stop member 2| is in its innermost position withrespect tothe housing Il).

'In Figure 3 the stop member 2| is shownprojected its maximum distanceas determined by the pin 38 reaching the rearward end of the groove 32.It will be apparent from Figure 3 that the unthreaded end portion 36 oithe stop member 2| will strike the end wall I8 of the housing l0 toeffect a limit to the inward movement of the stop member 2|. The factthat this end portion 36 has had the external threads removed prevents alocking of the threads 20 and 22 and therefore facilitates easy startingand stopping of the stop member whenever desired.

In operation the adjustable stop member 'is used in conjunction withmilling machines or with machines where an adjustable stop is adaptable.In the case of a milling machine, however, it is desired on alloccasions to be able to regulate the carriage travel withinpredetermined limits. In such an installation two ot'h'e devices in thisinvention must be employed opposing each other, thus making it possibleto limit within thousandths of an inch the operational travel of themilling machine carriage. The entire device is bolted to the millingmachine through the apertures I2 in the flat portion of the housing I0with the stop member 2| in position to engage the carriage at one end ofits travel. In order to regulate the position of the stop member 2| theknurled portion 2l of the actuating member 24 is rotated so that thecalibrated scale 28 moves with respect to the stationary index 29 on thehousing It.` As the actuating member 24 vis rotated the pin 30 alsorotates and by reason of its engagement 'inf-the groove 3.2,` causessimultaneous rotation. of the stop member il. vRotation of the stopmember causes the external threads 22 thereon to move with respect tothe internal threads 20 of the housing ID. The actuating member 24,however, does not move axially but rather is maintained in its positionwith respect to the housing I by reason of the set screw 35. Rotation ofthe actuating member 24 therefore permits axial movement of the stopmember 2l with respect to.-`

the housing l0 by reason of the pin 30 engaging the surface groove 32 inthe stop member 2|.

It is apparent. from the drawingA that the means effecting axialmovement of the stop member 2l with resp-ect to the housing lll areentirely' enclosed within the housing Il) and/or within. the sleeveactuating member 24. This feature is' Very important in thatlit'prevents metal filings, oil, grease or the like from kcoming incontact with the threaded engagements which would cause Wear and thuschanging or impairing the initial calibration of the instrument. Thereareno wearing' parts with which the operator may tamper inasmuch as themechanism is entirely enclosed, and here again is a feature very muchneeded in conjunction with adjustable stops on shop machines'.

, Numerous detailsv lof construction may be varied throughout a Widerangev withoutA departing from the principles disclosed herein, andI'therefore' do not-proposelimiting the patent granted hereon otherwisethan as necessitated by the. appended claims.

What' is claimed is:

l; An adjustable stopcomprising a housing havingf a bore extendingthrough a4 substantial portion thereof, said bore opening at one end ofthe housingand having a relatively large. diameter portion at itsopening and having a reduced diameter portion inwardly of the opening,said reduced diameterV portion being internally thread:- ed,fanadjustable stop member having. a portion thereof externally threaded,said.. externally threaded portion engagingtheinternally threadedportion of theV bore, said adjustablestopmember having an unthreadedportion projecting externall-'y of said housing, a longitudinallyextending surface groove in the stop member, an. actuating memberincluding a first sleeve, portion adapted totelescopewithintheirelatively large diameter portion of the; housingv bore, avsecond sleeve portion or said actuating member integral with said iirstsleeve portion and projecting from the; housing, said; second. sleeveportion including a scale.` around. the; periphery thereof. and means Yfor rotatingsaidl actuatingf. memben. an indexing' point for1 theperipheral; scale onf'saidihousingg adjacent saidzscale', said rstsleevef portionhaving anapertureithe: Wall and'aapin having, a slidingnt: in said aperture; and. engaging; the surface groove, said first:sleeve portion. having, an, annular groove, and-a.setiscrewithreadedfinlsaid housing and adapted to engage; said annular groove whenrthe;vsecond sleeve:portion,abnts the openscrewv isinposition engaging. the:annular groove of` the actuating vmember and holding it xed againstlongitudinal. movementV with respect. to

Y saidhQuSinS,

2. An adjustable stop comprising a housing having a bore extendingthrough a substantial portion thereof, said bore opening at one end cithe housing and having a relatively large diameter portion at itsopening and having a reduced diameter portion inwardly of the opening,said. reduced diameter portion being internally threaded, an adjustablestop member having a portion thereof" externally threaded, saidexternally threaded portion engaging the internally threaded portion ofthevbore, said adjustable stop member having. an unthreaded portionprojecting externally of said housing,l a longitudinally ex.- tendingsurface groove in the stop member, a dilrectly operating actuatingmember including a first sleeve portion. adapted. to telescope withinthe relatively large diameter portion. of. the housing bore, a. secondsleevev portion. off said actuating member integral. with. said rstsleeve portion and; projecting from the housing, said sec.- ond sleeveportion including. means.. for rotating said actuating member, saidrstsleeve portion having an aperture in thewall and-.a pinhaving a slidingnt in said aperture and engaging the surface groove, said, rst sleeve,`portion having an annular groove, anda set screw threaded insaid housingand adapted. to engage said annular groove when the second sleeve;portion abn-ts the opening of the bore in the; housing whereby the stopmember may be axially adjustedwith re.- spect to said housing uponrotation ofsaid` ac'.- tuating member without; exposing any threadedportions.

3; An Jadj-us-lfable;stop. comprisinga housinghaving a boreextendingthroughf a; substantial'. portion thereof-i, said' bore openingat. one endot the housing and having a relatively large diameter portionat its opening andhaving a; reduced. diameter portion inwardly off theopening; said' re,- duced diameterportionl beinginternall'y threaded, anadjustable stop memherr'having a: portion thereof externallythreadled1,v said externally threaded portion engaging the internallythreaded portion ot the. boreysaid adjustable stop member having; anUnthreaded portion. projecting externally of said housing, a,longitudinally extending surface groove. in theJ stopi member, adirectly operating actuatingzmeinberincluding a first sleeve' portionadapted to telescopea within the relatively:large'diameter portion oiithe heusing bore, a seeond sleeve portion. of said' actuating memberintegral with, said lirsti sleeve portion and projecting from'. thehousing;A said second. sleeve: portion including: means; for rotatingsaid actuating member,` saldi rstrsleevey portion having an aperture inthe wall and apin having a sliding iit in` saidv aperture andi engagingthe surface groove,u and means for maintaining said actuatingmei'nber-irrv fixed axial' relationship with said' housing' whereby;the: stop member maybeaxially adjusted-with respect tosaid housing uponrotation of" said actuating memberl with only smooth surfaced elementsbeing exposed.

' ELMER FELLESGN.

REFERENCES. CITED.

They following references' are of" record in the tile of this patent:

UNITED STATES PATENTS Number. Name Date 1,480,522: Ferguson Jan.. 8;1924 1482348 Groene et al;- Feb. 2'1, 19139 2,3443509 Guenther Mar.`21., 1944

